Process for photochemical stabilization of polyamide fiber material and mixtures thereof with other fibers: water-soluble copper complex dye and light-stabilizer
AssigneeCiba-Geigy Corporation
InventorGerhard Reinert
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Abstract
A process for the photochemical stabilization of polyamide fiber material or mixtures thereof with other fiber materials which comprises treating the fiber material with a mixture of (A) a water-soluble copper complex dye or a mixture of copper complex compounds, at least one component being a water-soluble copper complex dye, (B) a light stabilizer and if desired (C) an antioxidant, an agent for carrying out the process and the fiber material treated therewith are described.
Claims23
A process for the photochemical stabilization of polyamide fibre material or mixtures thereof with other fibre materials, which comprises applying to the fibre material from an aqueous bath a mixture of
- (A) a water-soluble copper complex azo dye or a mixture of a water-soluble copper complex azo dye and a non-chromophoric water-soluble copper complex which has fibre affinity and is selected from the group consisting of bisazomethines, acylhydrazones, semicarbazones and thiosemicarbazones of aromatic aldehydes and ketones,
- (B) a light stabilizer selected from the group consisting of 2-hydroxybenzophenone, 2-(2'-hydroxyphenyl)-benzotriazole and sterically hindered amines, and if desired
- (C) an antioxidant.
Dependencies are inferred from the claim text.